2004 Porsche Boxster Tire Size
Your Porsche was manufactured with different tire sizes. To determine the best tire size for your specific 2004 Porsche Boxster, we first need to determine your rim size. Please review the information below.
How to Determine Rim Size
Check your existing tires. Your Porsche Boxster's rim size is the number to the right of the R. In the example pictured here, the tire size fits 16inch rims.
Rim Size Selection
Now that you know your rim size, make a selection below to filter your results.
16Inch Rims
2004 Porsche Boxster
The original tire size for your 2004 Porsche Boxster is listed below. Tap on the box to view a colorcoded explanation of your Porsche Boxster's' tire size.
225/50ZR16(Rear)
Simplified Size: 2055516
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 205/55ZR16 (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
225  This number indicates that your tire has a width of 225 millimeters.  
16  The tire size was designed to fit rims or wheels that are 16 inches in diameter.  
Z  This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h). A tire's speed class is less specific than the speed rating.  
50  This number means that your tire has an aspect ratio of 50%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% of the width. In this case, the sidewall height works out to be 112 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

205/55ZR16(Front)
Simplified Size: 2255016
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 205/55ZR16 (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
205  This number indicates that your tire has a width of 205 millimeters.  
16  The tire size was designed to fit rims or wheels that are 16 inches in diameter.  
Z  This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h). A tire's speed class is less specific than the speed rating.  
55  This number means that your tire has an aspect ratio of 55%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 55% of the width. In this case, the sidewall height works out to be 112 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

17Inch Rims
2004 Porsche Boxster
There are multiple tire sizes for your 2004 Porsche Boxster that depend upon the trim level. Look for your trim level below to get a colorcoded explanation of your tire size. Then pick the best tire size for your 2004 Porsche Boxster.
Trim Options:
(Winter Tires)S (Winter Tires)
225/45R17 90(Rear)
Simplified Size: 2055017
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 205/50R17 89T (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
225  This number indicates that your tire has a width of 225 millimeters.  
17  The tire size was designed to fit rims or wheels that are 17 inches in diameter.  
90  This tire has a load index of 90, which means it's capable of carrying a load of 1320 pounds (600 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
45  This number means that your tire has an aspect ratio of 45%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width. In this case, the sidewall height works out to be 101 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
This tire has a speed rating of T, which means 118 mph (190 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
Trim Options:
(Winter Tires)S (Winter Tires)
205/50R17 89(Front)
Simplified Size: 2254517
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 205/50R17 89T (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
205  This number indicates that your tire has a width of 205 millimeters.  
17  The tire size was designed to fit rims or wheels that are 17 inches in diameter.  
89  This tire has a load index of 89, which means it's capable of carrying a load of 1276 pounds (580 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
50  This number means that your tire has an aspect ratio of 50%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% of the width. In this case, the sidewall height works out to be 102 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
This tire has a speed rating of T, which means 118 mph (190 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
255/40ZR17(Rear)
Simplified Size: 2055017
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 205/50ZR17 (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
255  This number indicates that your tire has a width of 255 millimeters.  
17  The tire size was designed to fit rims or wheels that are 17 inches in diameter.  
Z  This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h). A tire's speed class is less specific than the speed rating.  
40  This number means that your tire has an aspect ratio of 40%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width. In this case, the sidewall height works out to be 102 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

205/50ZR17(Front)
Simplified Size: 2554017
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 205/50ZR17 (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
205  This number indicates that your tire has a width of 205 millimeters.  
17  The tire size was designed to fit rims or wheels that are 17 inches in diameter.  
Z  This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h). A tire's speed class is less specific than the speed rating.  
50  This number means that your tire has an aspect ratio of 50%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% of the width. In this case, the sidewall height works out to be 102 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

18Inch Rims
2004 Porsche Boxster
There are multiple tire sizes for your 2004 Porsche Boxster that depend upon the trim level. Look for your trim level below to get a colorcoded explanation of your tire size. Then pick the best tire size for your 2004 Porsche Boxster.
Trim Options:
(Winter Tires)S (Winter Tires)S Special Edition (Winter Tires)
265/35R18 93(Rear)
Simplified Size: 2254018
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 225/40R18 88H (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
265  This number indicates that your tire has a width of 265 millimeters.  
18  The tire size was designed to fit rims or wheels that are 18 inches in diameter.  
93  This tire has a load index of 93, which means it's capable of carrying a load of 1430 pounds (650 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
35  This number means that your tire has an aspect ratio of 35%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width. In this case, the sidewall height works out to be 92 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
Trim Options:
(Winter Tires)S (Winter Tires)S Special Edition (Winter Tires)
225/40R18 88(Front)
Simplified Size: 2653518
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 225/40R18 88H (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
225  This number indicates that your tire has a width of 225 millimeters.  
18  The tire size was designed to fit rims or wheels that are 18 inches in diameter.  
88  This tire has a load index of 88, which means it's capable of carrying a load of 1232 pounds (560 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
40  This number means that your tire has an aspect ratio of 40%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width. In this case, the sidewall height works out to be 90 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
265/35ZR18(Rear)
Simplified Size: 2254018
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 225/40ZR18 (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
265  This number indicates that your tire has a width of 265 millimeters.  
18  The tire size was designed to fit rims or wheels that are 18 inches in diameter.  
Z  This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h). A tire's speed class is less specific than the speed rating.  
35  This number means that your tire has an aspect ratio of 35%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width. In this case, the sidewall height works out to be 92 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

225/40ZR18(Front)
Simplified Size: 2653518
Simplified size is useful for shopping and buying tires.
The original tire size for your 2004 Porsche Boxster is 225/40ZR18 (Front). A colorcoded explanation of the 2004 Porsche Boxster's tire size is shown below.
225  This number indicates that your tire has a width of 225 millimeters.  
18  The tire size was designed to fit rims or wheels that are 18 inches in diameter.  
Z  This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h). A tire's speed class is less specific than the speed rating.  
40  This number means that your tire has an aspect ratio of 40%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width. In this case, the sidewall height works out to be 90 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
